IRONMAN Leeds
Leeds, United Kingdom · August · IRONMAN
Why people love it
- England's only full-distance IRONMAN
- Park hub with a four-loop run and standout crowds
- Ranked third best IRONMAN in EMEA in a 2025 athlete survey
- Calm lake of about 21 °C (70 °F) with wetsuits normally legal
Watch out for
- 2026 swim cancelled for blue-green algae less than 24 hours before the start
- About 2,574 m (8,445 ft) of bike climbing over 180 km (112 mi)
- Few independent athlete reviews exist yet; 2027 date to be confirmed
- Parking queues, few toilets and steep walks around Roundhay Park reported
- Black Hill Road (up to about 15%) is climbed three times
Race
How racers feel about it, how well it is run, and how it treats a first timer. Counts for 27% of the overall score.
- Racer satisfactionLoved3.9
2025 reports were very positive. In 2026 a first-timer gave 8.5/10 despite no swim, while a veteran would not return. Few independent reviews. · Low confidence
- OrganizationAdequate3.3
The expo, practice swim, volunteers and traffic control drew praise. Negatives: a late 2026 swim cancellation, parking queues, few toilets and two bike aid stations. · Medium confidence
- First timer friendlyDemanding2.3
A 2026 first-timer scored it 8.5/10, but 2,574 m (8,445 ft) of bike climbing, Black Hill Road three times and a hilly run are demanding. · Medium confidence
Course traits, not part of the score
- PR potentialSlow1.7
Slow: 2,574 m (8,445 ft) of bike gain and 415 m (1,362 ft) of run gain, though one finisher beat a prior Ironman. · Medium confidence
- Course easeVery tough1.8
Black Hill Road, up to about 15%, is climbed three times within 2,574 m (8,445 ft) of bike gain. Many riders walked on lap three. · Medium confidence
Swim
Wetsuit odds, water temperature, calm, and the experience of the start. Counts for 15% of the overall score.
- Wetsuit legalAlmost always4.6
Lake water is typically about 21 °C (70 °F) against the 24.5 °C (76.1 °F) limit, though a heatwave can push it higher. · Medium confidence
- Water temperatureIdeal4.7
Typically about 21 °C (70 °F), in the comfortable 19-23 °C (66-73 °F) range. · Medium confidence
- Calm waterGlassy4.6
A sheltered park lake with no current. Scrums can stir the water. · Medium confidence
- Swim easeEasy3.5
Two 1.9 km (1.2 mi) laps with no Australian exit, and scrums in a small lake. · Medium confidence
- Swim experienceFine3.0
A calm two-lap park lake with 1.9 km (1.2 mi) laps, but crowded, scrappy starts were reported. Algae risk shut the 2026 swim. · Medium confidence
Bike
Road surface, closures, scenery and wind. Counts for 19% of the overall score.
- Road surfaceMixed2.6
We found no direct evidence. Wet descents caused crashes in 2026. · Low confidence
- Road closuresMostly closed4.2
Closures were published by Leeds City Council and traffic control drew praise, though some parish councils complained of poor consultation. · Medium confidence
- Bike sceneryBeautiful3.9
Harewood House, Eccup Reservoir, Golden Acre and Yorkshire villages. · Medium confidence
- WindSome wind3.2
Inland rolling Yorkshire with a headwind on the exposed third lap. No systemic wind problem. · Low confidence
Course traits, not part of the score
- Bike speedSlow1.7
Three loops with about 2,574 m (8,445 ft) of gain and a steep repeated climb. No heavy wind. · Medium confidence
- Bike flatnessMountainous1.1
Sources report 2,419-2,700 m (7,936-8,858 ft) of climbing, and most say 2,574 m (8,445 ft). · High confidence
- Bike simplicityTechnical2.4
Climbs of up to about 15%, and slippery wet descents with several crashes in 2026. · Medium confidence
Run
Crowds, aid stations, conditions underfoot and scenery. Counts for 13% of the overall score.
- Crowd supportElectric4.6
Standout crowd energy in 2025 and 2026 reports: cowbells, music, village parties, street aid stations and a pub. · Medium confidence
- Aid stationsStandard3.2
Creative street aid stations drew praise, but reports mention only two official bike aid stations and poor post-race food. · Low confidence
- Run sceneryBeautiful3.5
Four loops of Roundhay Park, with a parkland setting and a cricket pavilion finish. · Medium confidence
- Run conditionsModerate2.8
Hilly loops after a hard bike, but parkland shade and cool temperatures help. · Low confidence
Course traits, not part of the score
- Run flatnessHilly2.4
415 m (1,362 ft) of gain over four Roundhay Park loops, described as hilly. · Medium confidence
Conditions
Air temperature, how predictable the weather is, setting, and spectating. Counts for 15% of the overall score.
- Air temperaturePleasant3.8
Typical air is 12-19 °C (54-66 °F), cool but pleasant. A cold, wet 2026 morning made it harder. · Medium confidence
- Weather reliabilityVariable2.7
A 2026 heatwave caused algae and the swim cancellation, then a cold, wet race morning. 2025 was overcast with light rain. British August varies. · Medium confidence
- Venue beautyLovely3.6
A large city park plus Yorkshire countryside. Attractive rather than dramatic. · Low confidence
- Spectator friendlyEasy4.1
A park hub with four run loops, plus village crowds on the bike. · Medium confidence
Course traits, not part of the score
- Low altitudeSea level4.9
Leeds is roughly 100 m (330 ft) above sea level. · Medium confidence
Stay and travel
Hotels, walkability, getting there, and the town around the race. Counts for 11% of the overall score.
- Hotel availabilityGood4.1
A large city. We found no sell-out data. · Low confidence
- Hotel valueNormal3.2
We found no pricing data. A 2025 finisher used an Airbnb about 10 minutes away. · Low confidence
- WalkabilitySome driving2.6
Accommodation is often 5-6 km (3-4 mi) from the park, and athletes reported parking queues and a steep walk to registration. · Medium confidence
- Travel easeEasy4.1
Leeds Bradford airport (LBA) and Manchester are within reach, with major rail links. · Medium confidence
- LogisticsSome complexity3.3
Roundhay Park is the hub, but athletes reported parking queues, few toilets and an exit pinch point. A first-timer scored logistics 5/10. · Medium confidence
- Town and foodGood4.0
A major city with wide food options. · Low confidence
Key facts
- Location
- Leeds, West Yorkshire, United Kingdom
- Typical month
- August
- Latest or next date
- 16 August 2026
- Organiser
- IRONMAN
- Field size
- About 1,000 athletes
- Entry fee
- About $940
- First held
- 2025
- Distances
- 3.8 km (2.4 mi) swim, 180 km (112 mi) bike, 42.2 km (26.2 mi) run
- Cutoffs
- Swim 2:20, Bike 10:30, Finish 17:00
- Swim venue
- Waterloo Lake, Roundhay Park (lake)
- Water temperature
- 21 °C (70 °F)
- Wetsuit
- Legal
- Swim start
- rolling
- Swim laps
- 2
- Bike climbing
- 2,574 m (8,440 ft)
- Bike laps
- 3
- Key climbs
- Black Hill Road
- Run climbing
- 415 m (1,360 ft)
- Run laps
- 4
- Run shade
- Parkland
- Air temperature
- 12–19 °C (54–66 °F)
- Nearest airport
- Leeds Bradford (LBA)
- Where to stay
- Roundhay, Leeds city centre
- Booking
- No race-week data found.
What racers and reviewers say
- ITV News CalendarRaced 2026 · article · Negative
Reports the 2026 swim was dropped the day before because blue-green algae made Waterloo Lake hazardous after a heatwave; event ran as bike and run.
- 220 TriathlonRaced 2025 · article · Mixed
First-person account (from search summary; page not retrievable): water scrums, enthusiastic crowds, climbs some riders could not ride, headwind on lap three, champagne-style finish.
- Tri247Raced 2025 · article · Mixed
Course announcement: swim of two 1.9 km (1.2 mi) laps in Waterloo Lake with no Aussie exit, three-loop hilly bike with Black Hill Road main test, past Harewood House and Eccup Reservoir.
- RacePassRaced 2027 · aggregator · Mixed
Listing: lake swim, 180 km (112 mi) over three loops with about 2,500 m (8,200 ft) climbing, four-loop run in Roundhay Park, about 1,000 participants, rated challenging; price about GBP 700.
- haid.appRaced 2026 · aggregator · Positive
Listing: England's only full-distance IRONMAN, lake about 21 °C (70 °F), highs about 19 °C (66 °F), hilly bike and run. Notes athlete survey placing it third-best IRONMAN in EMEA in 2025.
Show 5 more
- Enduraprep (Adam's First Ironman)Raced 2026 · blog · Positive
First-timer's report of the bike-run-only 2026 race. Learned of the swim cancellation the day before and was gutted; clear emails and smooth registration, strong traffic control. Praised the 2,500 m (8,200 ft) climbing bike, village crowds and creative roadside aid; cold, wet morning made descents slippery with several crashes. Scored the race 8.5/10, organisation 7/10, logistics 5/10, and would recommend it if the swim contingency is addressed.
“I was gutted, even though it wasn't a surprise.”
- NickopotamusRaced 2026 · blog · Mixed
Finisher of the 2026 no-swim race calls it well run and challenging but would not return. Criticises the late, Instagram-first cancellation notice, but credits the extended cut-offs. Bike has about 2,700 m (8,860 ft) with Black Hill Road the highlight; hilly marathon with strong crowds. Post-race food was poor, the steep walk to registration and climb back to the car park were tiring, and local parish councils complained of poor consultation on closures. Notes the heatwave-and-drought algae risk may recur.
“Is it an Ironman if you didn't swim?”
- Tri Team Glos (Jon Murgatroyd)Raced 2025 · blog · Positive
Inaugural-year club report, 14:06 finish and 90+ minutes faster than his previous Ironman. Crowded small-lake swim, steep Black Hill repeated three times (walked it on lap three), strong dense crowd support including street aid stations and a pub. Praised expo, practice swim and volunteers; dinged for only two bike aid stations, few toilets, long parking queues and an exit pinch point. Stayed in an Airbnb about 10 minutes away.
“Well done Leeds, you did yourselves proud on this one.”
- 220 Triathlon (Michelle Farrow)Raced 2025 · article · Positive
First-full-distance account of the 2025 race. Describes a scrappy lake swim start, a punishing Black Hill Road on lap three into a headwind where many riders walked, and standout crowd energy with cowbells, music and local characters. Read only in part via search summaries because the page blocked direct fetch.
- TRI247 (Athlete anger after swim cancelled)Raced 2026 · article · Mixed
News report on athlete reaction to the 2026 cancellation after UKHSA-advised blue-green algae findings: many learned via social media before email, disappointment and anger, calls for partial refunds, while some coaches backed the decision on safety grounds. Via search summaries only (page blocked direct fetch).
Sources
Pages we used for facts and ratings. See how we rate.
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